流动分析仪快速测定土壤全磷含量
作者:
作者单位:

(1.中国林业科学研究院热带林业实验中心,广西 凭祥 532600;2.广西友谊关森林生态系统国家定位观测研究站,广西 凭祥 532600)

作者简介:

李朝英(1971-),女,甘肃酒泉市人,实验师,本科,主要从事实验室检测分析工作。E-mail:lzying1877@sina.com。

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基金项目:

基金项目:广西自然科学基金马尾松人工林采伐剩余物分解及提升地力研究(No.2013GXNSFAA019106)。


Rapid determination of total phosphorus in soil by flow analyzer
Author:
Affiliation:

(1.Experimental Center of Tropical Forestry,Chinese Academy of Forestry,PingxiangGuangxi532600;2.Guangxi Youyiguan Forest Ecosystem ResearchStation,Pingxiang Guangxi532600)

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    摘要:

    土壤经碱熔法消解,对连续流动分析仪和钼锑抗比色法所测土壤全磷含量进行比较分析,探讨流动分析仪测定碱熔法土壤全磷含量的可行性。结果表明,两种方法测定结果经 t检验,双尾 P(T ≤t)=0.5254,无显著性差异。回归直线方程y(流动分析仪-P)=1.0606x(钼锑抗比色法-P)-0.0191, R=0.9900。流动分析仪测定碱熔法土壤全磷的加标回收率在 98.09%~ 102.89%,3个样品重复测定 5次的相对标准偏差为 1.20%~ 2.07%。流动分析仪精密度与准确性高,试剂用量少,检测效率高,适用于批量土壤全磷的检测分析。

    Abstract:

    Soil samples were digested by alkali melting method. The contents of total phosphorus in soil determined by contin-uous flow analyzer and antimony colorimetric methods were compared and analyzed. The feasibility of determining total phos-phorus content in soil by continuous flow analyzer was discussed. The results showed that there was no significant difference and there was a good correlation between the two methods. The regression linear equation was y(flow analyzer -P)= 1.060 6 x(molybdenum-antimony anti-colorimetric method-P)-0.0191, R = 0.990 0. The recovery of total phosphorus in alkali-fused soils was 98.09%~102.89% by flow analyzer,and the relative standard deviation was 1.20%~ 2.07% after repeateddetermination of three samples for five times. Flow analyzer had high precision andaccuracy,less reagent consumption and high detection efficiency. It was suitable for the detection and analysis of total phosphorus for massive soil samples.

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李朝英,郑路.流动分析仪快速测定土壤全磷含量[J].中国土壤与肥料,2020,(4):266-270.

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  • 收稿日期:2019-07-09
  • 最后修改日期:
  • 录用日期:2019-09-13
  • 在线发布日期: 2020-09-24